Vertical pump motor with top adjustment



May 15, 1928.

3,669,938 c. E. JOHNSON z-:T A1.

VERTICAL PUMP MOTOR WITH TOP ADJUSTMENT Filed July 2, 1925 2 sheets-sheet vl 8 I 6 Z5 37 l I 3'7 4a? y"5 a a May l5, 1928. 1,669,938

c. E. JoHNsoN ET A1.

VERTICAL PUMP MOTOR WITH TOP ADJUSTMENT Filed July 2, 1925 2 sheets-sheet 2 Patented taai itlttd.

@didi E. JQHNSGN NL') EARL MMDENHLL, 0E* LOS ANGELES, CMRNUL, AS-

SIGNORS l'@ UNTED STATES ELECTRICAL MANUFACTURING COIJPNZ', 0F LGS ANGELES, CLFORNIA, A CRPORATOIN 0F CLEORNM.

VERTECAL PUMP MOTOR WITH T? ADJUSTMENT.

Application led July 2,

This invention relates to irrigation pumps and it concerns a direct connected pump head.

irrigation pumps which our'invention concerns generally comprise a pump section which is placed at the lower part of a Well. Extending from this pump section is a column pipe which extends to the surfaceof the ground and is secured to a pump head. A pump shaft extends from impeller means in the pump section upwardlythrough the column pipe and attaches to rotating means or the pump head. Pump heads are of tvvo classes, belt driven heads and direct connected heads.

ltis an object of our invention to provide a direct connected pump head having a novel arrangement itor axially adjusting the pump shaft in order to properly positlon the 1mpeller means of the pump section.

lt is another object of our invention to provide a pump head of this character havmg a rotor secured directly to the pump shaft.

A still rnurther object et our invention is to provide a rotor which is longer than the stator so that the pump shaft may be ad-y justed Without danger of removing the rotor from the field of the stator.

Another object of our invention is to pro vide a radial and thrust bearing arrange-k ment by reason of which it is possible to provide the novel adjustment means of our invention.

Other objects and the particular advantages of our invention will be made evident hereinafter.

Referring to the two sheets of drawings in which we illustrate'a preferred form of our invention:

Fig. 1 is a vertical sectional direct connected pump head embodying the features of our invention.

lig. 2 is a section taken on the line 2 2 of Fig. 1, this vievv showing an upper thrust bearing ot our invention.

lig. 3 is a section talrenon the line 3--3 off Fig. 1, this view showing a lower radial bearing or our inrention.

The form or our invention shown in the 1925. Serial No. 41,032.

drawings comprises a pump head having a main body casting 11` having a 'horizontal annular vvall 12 on which an annular tace 13 of a stator trame le rests. rllhe stator frame 1li carries a stator 15 which may be of any well known construction.

rllhe main body 11 has a cup-shaped formation 16 which provides a lower bearing chamber 17. The cup-shaped member has an upwardly projecting annular lip 18 which forms a central opening 19. A, top trame 20 has an annular face 21 which rests on an annular shoulder 22 provided at the upper part of the stator frame 1li. The top frame V2O has a cup-shaped member 25 which provides an upper bearing chamber` 26. This cupshaped member 25 has an upwardly extending annular lip 27 which provides an opening 28. A cover 29 closes the upper part of the lovver bearing chamber 17, and a cover 31 closes the upper end of theupper bearing chamber 26. rllhe cover 31 has a dome 32 and an annular lip 33 which extends inside the upper part ot the cylindrical wall of the cup member 25.

@n an annular shoulder 35 `orrned in the upper bearing chamber 26 there rests an outer race 37 of a thrust bearing 38. An inner race 39 of the thrust bearing 38 surrounds a cylindrical face d() oi: an upper bearing holder 41. A nut e2 clamps the race 39 in place on the upper bearing holder 4,1 against an annular face ed. The bearing holder 11 is placed, as shown clearly in Fig. 1, so that the annular lip 27 extends inran opening 43 thereof. A motor shaft 45 extends through an opening 46 ot the upper bearing holder 41, this shaft being threaded at the upper end as at 47 to receive an ad justment means in the -orm of a nut d8. The nut 48 engages the upper tace 49 et the upper bearing holder 41.

Rigidly secured on a portion 51 of the pump shaft i5 is a rotor 52, this' rotor operating in a cylindrical opening 53 formed in the stator 15. sclearly shownin 1, the rotor 52 is longer than the stator and entends to either side thereof.

A cylindrical part 55 of the shaft i5 en tends 1n an openig 56 of a lower bearing 5l a cylindrical face 62 and againsta radial face 63 of the bearing holder-57 b a lock nut 64. An outer race 65 ofthe radia .bearing 61 engages' a cylindrical face 67 y,of the bearing chamber 17. The lower bearing holder 57 is positioned so that the cylindrical lip 18 eirtends into an opening 68 thereof, as clearly shown in, 1. The shaft 45, as shown in F ig. 1, extends through a suitable stuiiing box 69 ot the body 11 and extends down to the pump 'section of the pump (not shown).

It is necessary to accuratel adjustv the vertical position ofthe ump s aft in order to position the impel ers of the pump section in proper working disposal. ln the common type of direct connected pump it is quite inconvenient to make this adjustment, owing tothe fact that the shaft of the lmotor and the pump shaft must be separate because the rotor of the motor cannot be axially moved and it is necessary to adjust the pump shaft independently of the motor shaft. In our invention we provide a construction which eliminates previous diiiculties and renders it quite easy to adjust the pump. shaft'to proper axial position. rlhe pump shaft 45 of our invention is adjusted as follows:

rihecover 31 is removed, which gives acccss to the adjustment nut 48. The adjustment nut 48 is then rotated relative to the 35 shaft 45, the shaft 45 being moved upward or downward as desired. The motor shaft when being adjusted is moved relative to the upper bearing holder 41 and obviously to the thrust bearing 38. The lower bearing holder 57, however, being shaft 45 moves therewith an consequently the radial bearing 61 is moved with the shaft. 'lhe rotor 52, as previously mentioned, is somewhat longer than the stator 15 and is not moved out of the field when the pump shaft 45 is moved axially. Therefore, an adjustment of the shaft has no detrimental eects on the operation of the motor of the pump head. j

rlhe bearing'chambers 17 and 26 are filled with oil, which oil may be kept at a 'level lower than the u per end of the annular lips 18 and 27. he upper bearing of our invention is adapted to take all of the weight of the pump, and the lower radial bearing 61 is arranged to take the radial strains and prevent disalignment oit the shaft 45 at this point, thus retaining the rotor 52 centrally in the stator 1,5.

From the foregoing description it is evident that by our invention it is possible to readiiy. adjust the pump shaft of an irrigation pum of this type. @ur invention eliminates t e needfor making the motor l shaft separate, principally by the' bearing inned to the arrangements and by providing a rotor which is longer than the field so that it may be moved axially without interfering with theoperation of' the motor. The bearing arrangement of our invention is quite novel in itself and it is'mostly due to this novel arrangement that weare able to accomplish our invention. A v

We claim as our invention:

1. In a motor construction, the combina- 'tion of.: a vertical shaft; an upper thrustbearing for supporting said shaft; a lower radial anti-friction bearing mounted on said shaft andadapted to move vertically therewith; means -or vertically adjusting said shaft relative to said thrust bear1ng;'a stator having a, magnetic body, and surrounding said shaft; and a rotor secured rigidly to said shaft, said rotor being place said stator and having a magnetic body of a dierent length than said magneticbody of said stator in order that a vertical movement of said shaft will not adect the operating'characteristics of said motor.A

2. In a motor construction, the combination of: a vertical shaft; an upper thrust bearing for'supporting said shaft; a lower radial anti-frictlon bearing mounted on said shaft and adapted to move vertically therewith; means for vertically ad'usting said shaft relative to said thrust bearmg; a stator having a magnetic body, and surrounding said shaft; and a rotor secured rigidly to said shaft, said rotor being placed inside said stator and having a. magnetic body of a greater length than said magnetic body of said stator in order that a vertical movement of said shaft will not aect the operating characteristics of said motor.

3. ln a motor construction, the combination of: a vertical shaft; an u per thrust bearing for supporting said s aft; Walls forming an u per bearing chamber, said thrust bearing eing placed therein; a lower radial anti-friction bearing mounted on said shaft and adapted to move vertically therewith; walls forming a lower bearing chamber, said radial bearing `being vertically movable therein; means for vertically ad- 'ustin'g said shaft relative to said thrust caring; a stator having a magnetic body, and surrounding said shaft; and a rotor secured rigidly to said shaft, said rotor being placed inside said stator and having a magnetic body of a dierent length than said magnetic body of said stator in order that a vertical movement of said shaft will not adect the operating characteristics of said motor.

p 4. lin a motor construction, the combination of: a supporting trame; a stator carried thereby; a vertical shaft; a rotor positioned within said stator and fixed to said shaft; an upper thrust hearing carried by said frame` and supporting said rotor and inside y llo shaft; a lower radial anti-friction bearing and lower bearing relative to said frame and movable vertically with vsaid shaft and instator. 10 cluding an'inner annular race secured' to said InA testimony. whereof, we have hereunto shaft, an outer annular race slidably sup-` set our hands at Los Angeles; California, ported in said frame and surrounding said this 26 day of June, 1925.

inner race, and rotatable bearing elements between said inner and outer races; and CARL E. JOHNSON.

means for axially adjusting said shaft, rotor EARL MENDENHALL. 

